30 Nov
2010
30 Nov
'10
11:48 p.m.
On Tue, Nov 30, 2010 at 10:06 AM, Robert Jones
Something that just returns it's single argument, eg.,
template <typename T> T identity( T t ) { return t; } ... (I need this because I need to pass a function object which simply returns an object I already have - maybe I've missed a more obvious method?)
The way you wrote it, wouldn't that actually return a temporary that is a copy of the object you already have? (rather than a const T& or something) I think the unary operator+() has similar semantics by convention, but you'd have to consider the types being used and whether they define it at all.